Bell spinning and twisting frame



Sept. 12, 1933. H; HORST BELL SPINNING AND TWISTING FRAME Filed March 28, 1931 A TTORNEYS I Patented Sept. 12, 1933 ins re rro iszsoes BELL SPINNING AND TWISTING FEAME Application March 28, 1931, Serial No. 525,991, and in Germany February 3, 1930 1 Claim.

When operating bell spinning and twisting frames the drawback is met with, that the spinning bell, not only when starting, but also when revolving at a higher speed, is rendered subject 5 to oscillations on attaining the critical speed, causing slipping thread, on the one hand, and a jamming of the bell during its axial up and down movement, on the either hand. The oscillations may eventually be so violent, that the bell is made to fly off the spindle, the latter being deflected in a lateral direction, or the spindle may even be fractured.

For the working efficiency of bell spinning and twisting machines it is, for this reason, absolutel indispensable, that the bell, as well as the spin dle appertaining thereto, is working quite smoothly or, in other words, free from any oscillations whatsoever. In order to attain this aim, it has already been attempted to provide, apart from an axial support of the spinning bell, also a radial support for same, whereby, however, the oscillations may only be prevented towards one side, whilst towards the other side a considerable deflection may still take place. Moreover, the radially directed supporting rollers subject the thread, running through between the bell and the roller, to a very considerable strain, so that slipping threads are rendered unavoidable.

All the drawbacks mentioned herein will be effectively eliminated through the medium of the object of the present invention and even in conjunction with the highest rotary velocity spindle and bell will be perfectly free from oscillations whilst working. The bell does not jam, so that the thread is evenly wound up and slipping threads have been obviated.

The present invention essentially consists therein, that at the upper end of the bell, exactly or approximately so on a level with the guide bushing of the bell, a fly-wheel or centrifugal mass, such as a fly-wheel, for instance, is pro vided. In order to attain a satisfactory effect, this mass does not require to be situated exactly I, on a level with the guide bushing of the bell,

although the most advantageous disposition naturally will generally be possible within the horizontal plane determined by the ends of the guide bushing. The fly-wheel or centrifugal mass may r be provided above the guide bushing of the bell particularly then, when the lower part of the bell is comparatively heavy, because also in this instance the centre of gravity of the bell is approximately on a level with the guide of the bell on the spindle.

A particularly suitable example of performance in accordance with the present invention is yielded by the fact, that the upper end of the bell is rigid and made in one piece together with the guide bushing of the bell and the other parts thereof. G9

The recognition of this fact does away with a prejudice on the part of experts consisting therein, that up to now the provision of an elastic insertion in the shape of a rubber ring or the like between the guide bushing and the bell was U5 deemed essential, in order to guarantee a satisfactory working of the frame. By employing the fiy-wheel mass in accordance with the present invention it has been rendered possible to pro- F duce the whole of the spinning bell in one piece as mentioned previously, so that the prime cost may be reduced by some 30 to which, in view of the large number of spindles provided in a single machine, very strongly effects the total price of the machine. The spinning bell may now be cast in one piece in one working operation, not only in regard to its jacket, but also in regard to its upper end. If produced by means of the spray casting method, the bell will leave the mould entirely complete, in view of the fact, that the tolerance of the bore gliding along the spindle sleeve may be attained by this method of production with such a degree of accuracy, that any kind of finishing work has been ren- L, dered unnecessary.

In connection with this modus of production the fly-wheel or centrifugal mass may be cast into the upper end of the bell, so that a special screw thread for fastening purposes for the flywheel mass is rendered unnecessary with the re suit that the finished bell may be made ready for work within one working operation.

The present invention has been shown by way of example in the accompanying drawing, in which Fig. 1 represents a spindle with bell in section vertical to the direction of a row of spindles, whilst Fig. 2 shows two spindles of a row of spindles in front view.

Upon the spindle 1 actuated by a cord whirl the spindle sleeve 2, on which the spun yarn is wound up, has been mounted in a manner well known. The spindle sleeve 2 is made to carry the spinning hell 3 axially displaceable along the former, for which purpose the bell 3 is provided with a guide bushing 10 being made to engage a groove 11 of the spindle sleeve 2 by means of a projection. Between the guide bushing 10 and the bell-neck a conical rubber ring 12 has been upward movement of the rail 7 simultaneously causes the bell to be raised by means of the supporting roller 5, whilst the downward movement of the rail causes the bell to be continuously lowered as a result of its dead weight. V

A jamming, unavoidable in the known type of bell spinning frames, has been obviated with abso lute certainty by means of the fiy-wheel 8.

In order to accentuate the eflect of the fly-wheel 8, the lower part of the bell 3 is suitably made to consist of a light material, such as aluminium, for instance, or the like.

I claim:

A bell spinning and twisting machine, comprising in combination, a spindle, a spindle sleeve mounted on said spindle, a bell, means guiding said bell on said sleeve, means rotating said bell together with said sleeve, means connected with said bell for axially moving the same with respect to'said sleeve, and a fly-wheel carried by the upper end of said bell and situated substantially at the same level as the first-mentioned means.

HANS HORST. 

